OEM Carrier LP Gas Pressure Switch for Model PG8MAA036110AGJA

This OEM gas pressure switch is the factory-specified replacement for the Carrier PG8MAA036110AGJA packaged gas furnace. The pressure switch monitors the negative pressure (vacuum) created by the inducer blower motor to prove safe combustion airflow before allowing the gas valve to open. If the switch fails or cannot reach its set-point — typically 6.5" W.C. — the control board will lock out ignition entirely, leaving you with a furnace that attempts to start and immediately shuts down, or never progresses past the inducer stage.

• Specs: Set-point 6.5" W.C. | SPST configuration | Rated for LP (propane) and natural gas applications | Compatible with single-stage inducer circuits | Mounts horizontally or vertically
• OEM Part Numbers Covered: Primary — HK02LB008 (Gas Pressure Switch) | Also replaces HK06WC091 (Pressure Switch) and HK06WC100 (Pressure Switch w/ Bracket). OEM parts are factory-matched to exact W.C. set-point tolerances — aftermarket switches frequently mis-calibrate, causing nuisance lockouts or unsafe operation.
• Install Difficulty: 2/5 — Shut off gas and power before servicing. Inspect rubber hose barb for cracks before reusing. Tools needed: flathead screwdriver, needle-nose pliers, manometer (to verify hose integrity). Photograph hose routing and wire connections before disconnecting. If the inducer and hoses test good but the furnace still locks out, test switch continuity with a multimeter across the terminals.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PG8MAA036110AGJA packaged gas furnace. This switch also cross-references Bryant and Payne packaged unit variants sharing the same inducer circuit. Always verify your existing switch's W.C. rating and hose barb count against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — just reach out before placing your order.